Key takeaways
- Agree who measures, what the dimension represents and who approves the drawing
- Separate structural opening, finished opening and product size
- Record site conditions and photos tied to item codes
- Check the item as an assembly: handing, hardware, appliances and adjacent finishes
- Put a revision number and date on every production drawing
- Pause affected items when the site changes; confirm production status before revising
Architectural drawings provide a starting point. Site conditions and finished surfaces may introduce differences that must be resolved before manufacture.
WBDG’s documentation guidance includes submittals, as-built information and verification reports; keep design and verification records distinguishable. [1]
1. Distinguish the dimensions
A structural opening, a finished opening and a product’s overall size are not interchangeable. Ask the supplier and installer to use consistent terms on the drawings.
Installation allowances should be determined for the selected system and site detail. Avoid applying a single generic gap to every window, door or cabinet.
U.S. DOE guidance identifies installation and performance considerations for residential windows; it does not supply universal opening allowances. [2]
2. Record the conditions around the item
| Item | Conditions to document |
|---|---|
| Window | Opening dimensions, reveal depth, sill detail, opening direction and surrounding finish |
| Door | Finished floor level, wall thickness, frame detail, swing and hardware position |
| Kitchen cabinet | Walls, corners, service points, appliances, worktop and access panels |
| Wardrobe | Ceiling and floor conditions, skirting, adjacent doors and installation access |
| Stone worktop | Supporting units, wall geometry, cutouts, joints and edge requirements |
Take photographs that can be matched to item codes. A photograph without a location reference is difficult to interpret later.
NKBA’s kitchen and bath guidance can inform layout review alongside product-specific measurements. [3]
3. Agree who owns each confirmation
Identify the person collecting dimensions, the person preparing drawings and the person authorized to approve them. Ask the installer to review installation interfaces before the order is released.
VIGOHOME’s service page describes measurement support for custom products, including overseas visits. Availability, timing, deliverables and charges should be confirmed for the individual project.
4. Review the drawing as an assembly
Check the item’s position, handing, visible finish, hardware and connection to neighbouring work. For cabinetry, confirm the actual appliance models and their installation information. For doors, verify that the swing does not conflict with another fixture.
Record any unfinished work that could alter the dimensions. A room awaiting plaster, flooring or ceiling work may require a later verification rather than immediate production approval.
For projects subject to U.S. ADA requirements, the Access Board’s bathing-room guide addresses clearances; use applicable local requirements elsewhere. [4]
5. Control changes after approval
Use a revision number and date on the production drawing. Approval should identify the exact document, not simply refer to “the latest plan.”
If the site changes, pause the affected item and ask whether production has started. Confirm the technical, cost and schedule effects before accepting the revision. An updated site dimension does not automatically mean the manufactured product can still be changed.
CIPS includes contract performance and management within procurement; treat approved specifications and subsequent changes as controlled information. [5]
6. What should you keep?
Keep the measurement record, photographs, approved drawings, appliance references and change history together. These documents help the supplier, installer and site team work from the same information.
References
- WBDG Commissioning Committee. Commissioning Documents: Process, Contents, and Acceptance. Accessed 28 October 2026.
- U.S. Department of Energy, Federal Energy Management Program. Purchasing Energy-Efficient Residential Windows, Doors, and Skylights. Accessed 28 October 2026.
- National Kitchen & Bath Association (NKBA). Kitchen & Bath Planning Guidelines. Accessed 28 October 2026.
- U.S. Access Board. Guide to the ADA Accessibility Standards — Chapter 6: Bathing Rooms. Accessed 28 October 2026.
- Chartered Institute of Procurement & Supply (CIPS). CIPS Procurement and Supply Cycle. Accessed 28 October 2026.
Frequently asked questions
Who should measure custom windows, doors and cabinets?
Agree this before ordering. The person measuring, the person preparing drawings and the person approving them should be named, and the installer should review installation interfaces.
What is the difference between opening size and product size?
A structural opening, a finished opening and the product's overall size are different dimensions. Use consistent terms on the drawings and determine allowances for the selected system.
Can production start before plastering or flooring is finished?
Only if the unresolved work cannot change the dimensions. Otherwise record the unfinished work and verify later rather than approving production immediately.
What happens if the site changes after approval?
Pause the affected item, ask whether production has started, and confirm the technical, cost and schedule effects before accepting a revision.
Next: coordinate the approved products with a room-based finish schedule.